unhelpful (adj.)

• forgetful
• heedless
• inapplicable
• inconsiderate
• inoperable
• inoperative
• mindless
• nonfunctional
• otiose
• thoughtless
• unaccommodating
• uncooperative
• unemployable
• unfit
• unmindful
• unobliging
• unsuitable
• unthinking
• unthoughtful
• unusable
• unworkable